Frontal Lobes May Not Be That Important. Lots of Research and Neurocognitive Ideas May Wash Out.

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Enthusiasts for human exceptionalism and lots of other ideas and research about how humans are so much better and different from other animals, have concentrated on what they thought made the human brain different and was bigger – the frontal lobes.  They all think!  Wrong, it appears.  Oops.  Big oops, actually.

Human brain frontal lobes not relatively large, not sole center of intelligence
Human intelligence cannot be explained by the size of the brain’s frontal lobes, say researchers.  Research into the comparative size of the frontal lobes in humans and other species has determined that they are not – as previously thought – disproportionately enlarged relative to other areas of the brain, according to the most accurate and conclusive study of this area of the brain.

It concludes that the size of our frontal lobes cannot solely account for humans’ superior cognitive abilities.

The study by Durham and Reading universities suggests that supposedly more ‘primitive’ areas, such as the cerebellum, were equally important in the expansion of the human brain. These areas may therefore play unexpectedly important roles in human cognition and its disorders, such as autism and dyslexia, say the researchers.

The frontal lobes are an area in the brain of mammals located at the front of each cerebral hemisphere, and are thought to be critical for advanced intelligence.

“Probably the most widespread assumption about how the human brain evolved is that size increase was concentrated in the frontal lobes.

“It has been thought that frontal lobe expansion was particularly crucial to the development of modern human behaviour, thought and language, and that it is our bulging frontal lobes that truly make us human. We show that this is untrue: human frontal lobes are exactly the size expected for a non-human brain scaled up to human size.

“This means that areas traditionally considered to be more primitive were just as important during our evolution. These other areas should now get more attention. In fact there is already some evidence that damage to the cerebellum, for example, is a factor in disorders such as autism and dyslexia.”

The scientists argue that many of our high-level abilities are carried out by more extensive brain networks linking many different areas of the brain. They suggest it may be the structure of these extended networks more than the size of any isolated brain region that is critical for cognitive functioning.

 

Previously, various studies have been conducted to try and establish whether humans’ frontal lobes are disproportionately enlarged compared to their size in other primates such as apes and monkeys. They have resulted in a confused picture with use of different methods and measurements leading to inconsistent findings.”

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26 thoughts on “Frontal Lobes May Not Be That Important. Lots of Research and Neurocognitive Ideas May Wash Out.

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